This plugin hasnt been tested with the latest 3 major releases of WordPress. It may no longer be maintained or supported and may have compatibility issues when used with more recent versions of WordPress.

Visual Sitemap

Description

Displays an interactive visual sitemap in admin. A nice touch for sites delivered to clients, and useful for managing a site as it gives a visual overview of all pages, tags, and categories.

Screenshots

Visual sitemap page in admin.

Installation

Minimum Requirements

WordPress 3.0 or greater

PHP version 5.2.4 or greater

MySQL version 5.0 or greater

Automatic Installation

Automatic installation is the easiest option as WordPress handles the file transfers itself and you don’t even need to leave your web browser. To do an automatic install of Visual Sitemap, log in to your WordPress admin panel, navigate to the Plugins menu and click Add New.

In the search field type «Visual Sitemap» and click Search Plugins. Once you’ve found the plugin you can view details about it such as the point release, rating and description. Most importantly of course, you can install it by simply clicking Install Now. After clicking that link you will be asked if you’re sure you want to install the plugin. Click yes and WordPress will automatically complete the installation.

Manual Installation

Using an FTP program, or your hosting control panel, upload the unzipped plugin folder to your WordPress installation’s wp-content/plugins/ directory.

Activate the plugin from the Plugins menu within the WordPress admin.

Upgrading

Automatic updates should work like a charm; as always though, ensure you backup your site just in case.

FAQ

Installation Instructions

Minimum Requirements

WordPress 3.0 or greater

PHP version 5.2.4 or greater

MySQL version 5.0 or greater

Automatic Installation

Automatic installation is the easiest option as WordPress handles the file transfers itself and you don’t even need to leave your web browser. To do an automatic install of Visual Sitemap, log in to your WordPress admin panel, navigate to the Plugins menu and click Add New.

In the search field type «Visual Sitemap» and click Search Plugins. Once you’ve found the plugin you can view details about it such as the point release, rating and description. Most importantly of course, you can install it by simply clicking Install Now. After clicking that link you will be asked if you’re sure you want to install the plugin. Click yes and WordPress will automatically complete the installation.

It's a great plugin. Since I tend to prefer things to be laid out more visually attractive than straight lines of code or in lists, this plugin is helping me get organized to improve SEO and work on user experience.
I'd love to be able to scale the layout, however.
I definitely recommend.

Despite its age it works, but can't show deeper hierarchy than three levels, which makes its use quite limited. Inspecting the code reveals that the number of levels are hardcoded (parent -> child -> grandchild), rather than having a dynamic loop that iterates through all pages regardless of their level.
And I totally agree with previous reviews: a front-end option should be available too.